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ESP01 (ESP8266EX) - AT Command issue

PostPosted: Thu May 13, 2021 6:26 am
by StubbletUK
I have a generic ESP01 board from Amazon - at least that's what the seller says it is. :roll:

I have hooked it up to my USB board using a external breakout board that allows you to switch mode (UART / Program).

In UART mode I get a serial port (COM10) in Windows and can use the Serial Monitor in Arduino to send it commands. I have left the factory image in the flash so I can check basic functionality before sending it a sketch.

When I send basic AT commands - everything seems to work :

AT version: 1 2016 20:04:45)
SDK version:
Mar 11 2018 18:27:31

When I try and send a code that is WiFi specific I get an error:

Passive Scan

Active Scan

Thoughts anyone ?

Much appreciated


Re: ESP01 (ESP8266EX) - AT Command issue

PostPosted: Thu May 13, 2021 11:59 pm
by JurajA
the USB adapter can't supply enough current on 3.3 V pin

Re: ESP01 (ESP8266EX) - AT Command issue

PostPosted: Fri May 14, 2021 7:37 am
by StubbletUK
Sadly it was an even worse noob mistake - the device needed to be in STA mode for that particular command to work. ;)

Read the docs numerous times before spotting the requirement. :!:

Re: ESP01 (ESP8266EX) - AT Command issue

PostPosted: Mon May 17, 2021 4:43 am
by QuickFix
Hehehe, well you always learn best when making mistakes and fixing them on your own. ;)